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The Gallant-ported LT1 heads reveal modifications to the combustion chambers and bowls. The intake-port surface finish is devised to reduce fuel puddling. GTP porting is designed to produce maximum efficiency, which equals big flow numbers combined with high air speeds.
Wanted: LT1 With Attitude

 The Gallant-ported LT1 heads reveal modifications to the combustion chambers and bowls. The intake-port surface finish is devised to reduce fuel puddling. GTP porting is designed to produce maximum efficiency, which equals big flow numbers combined with high air speeds.  View Related Article

 

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